Xia Mingze, Shi Bingyan, Li Weimo, Yu Xianqiang, Qi Ruikai, Mu Ming, Wang Ce, Lu Xiaofeng
Alan G. MacDiarmid Institute, College of Chemistry, Jilin University, Changchun, 130012, PR China.
Zhejiang Normal Univ, Dept Mat Sci & Engn, Yingbin Rd 688, Jinhua 321004, PR China.
J Colloid Interface Sci. 2025 Aug 29;702(Pt 1):138880. doi: 10.1016/j.jcis.2025.138880.
Ruthenium (Ru) has emerged as a highly promising and cost-effective alternative to Ir- and Pt-based electrocatalysts for water electrolysis, making the development of efficient and stable Ru-based bifunctional catalysts a critical research objective. Herein, an AgCl/RuO heterojunction is prepared via a facile electrospinning-calcination strategy. The AgCl undergoes a reduction to form metallic Ag under hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) processes, which can be integrated with RuO active sites to facilitate HO dissociation and enhance the electron transfer while simultaneously suppressing RuO over-oxidation. Therefore, the optimized AgCl/RuO-300 NFs demonstrate exceptional HER performance, achieving an overpotential of only 105 mV at 1000 mA cm in 1 M KOH, along with remarkable stability, maintaining continuous operation for 270 h at this high current density. Furthermore, this catalyst also displays favorable alkaline OER performance, requiring overpotentials of just 214 and 275 mV to reach 10 and 100 mA cm, respectively. Crucially, an electrolyzer assembled with this bifunctional catalyst achieves 10 mA cm at a low cell voltage of 1.49 V, outperforming commercial Pt/C||RuO system and most recently reported electrolyzers. Additionally, the AgCl/RuO-300 NFs show significant potential for seawater electrolysis, demonstrating exceptional corrosion resistance and robust stability. This work offers a novel strategy for designing highly active and durable Ru-based electrocatalysts for both alkaline freshwater and seawater electrolysis.
钌（Ru）已成为一种极具前景且成本效益高的替代铱（Ir）基和铂（Pt）基电催化剂用于水电解的材料，使得开发高效稳定的Ru基双功能催化剂成为一个关键的研究目标。在此，通过一种简便的静电纺丝-煅烧策略制备了AgCl/RuO异质结。在析氢反应（HER）和析氧反应（OER）过程中，AgCl发生还原形成金属Ag，其可与RuO活性位点结合，促进HO解离并增强电子转移，同时抑制RuO的过度氧化。因此，优化后的AgCl/RuO-300纳米纤维表现出卓越的HER性能，在1 M KOH中1000 mA cm时过电位仅为105 mV，同时具有显著的稳定性，能在该高电流密度下持续运行270小时。此外，这种催化剂还表现出良好的碱性OER性能，分别达到10和100 mA cm时所需过电位仅为214和275 mV。至关重要的是，用这种双功能催化剂组装的电解槽在1.49 V的低电池电压下实现了10 mA cm，性能优于商业Pt/C||RuO体系以及最近报道的电解槽。此外，AgCl/RuO-300纳米纤维在海水电解方面显示出巨大潜力，表现出卓越的耐腐蚀性和强大的稳定性。这项工作为设计用于碱性淡水和海水电解的高活性、耐用Ru基电催化剂提供了一种新策略。
